| Customization: | Available |
|---|---|
| Type: | Rolling Wire |
| Material: | CO2 |
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RBCuZn-D Brass Welding/Brazing Filler Metal: A Comprehensive Technical Summary
AWS A5.8 Designation: RBCuZn-D (formerly celebrated as "Naval Brass")
Material Type: A robust Copper-Zinc alloy (Cu-Zn-Sn system), fortified with tin to significantly boost corrosion resistance.
Key Use: Ideal for Joining copper alloys, steel, and cast iron where exceptional seawater/chemical corrosion resistance is indispensable.
Table 1: Composition (Weight %)
| Cu | Zn | Sn | Fe | Pb | Si | Impurities |
|---|---|---|---|---|---|---|
| 58.0-61.0% | Rem. | 0.5-1.5% | 0.25-1.0% | ≤0.10% | 0.04-0.25% | ≤0.50% total |
Key Elements:
Sn (Tin): Provides enhanced resistance against seawater-induced dezincification.
Fe (Iron): Strengthens the alloy, enhancing its durability and wear resistance.
Low Pb/Si: Crucial for minimizing hot cracking during welding operations.
As-Deposited:
Tensile Strength: Ranges between 410-510 MPa, ensuring robust performance.
Hardness: Measured at 85-105 HB, ensuring a resilient welding joint.
Melting Range: 885-900°C (solidus-liquidus), allowing precision in thermal applications.
Corrosion Resistance: Demonstrates unparalleled performance in seawater, marine atmospheres, and stands up to mild acids/alkalis.
Marine Engineering: Perfect for ship propellers, seawater piping, and condenser tubes.
Industrial: Ideal for heat exchangers, pump components, and valve bodies.
Repair: Essential for joining/building up manganese bronzes and high-tensile brasses.
Process Compatibility:
Oxy-Acetylene Welding (OAW): Ideally suited for cast iron repairs, ensuring structural integrity.
Gas Tungsten Arc Welding (GTAW/TIG): Best for precision joints; remember to use DCEN polarity.
Parameters:
Flux Requirement: Utilization of AWS Type FB3-A or borax-based flux is crucial to prevent oxidation.
Preheat: 150-260°C is recommended for thick sections/cast iron, ensuring proper adhesion.
Interpass Temp.: Maintain ≤200°C to effectively avoid Zn fuming and ensure consistent quality.
Zinc Fume Hazard: Zinc fumes can pose significant health risks. Ensure proper safety measures are in place.: Employ cutting-edge local exhaust ventilation (LEV) systems and rely on OSHA-approved respirators to ensure a safe working environment.
Storage: Store securely in sealed containers maintaining humidity levels below 40% to effectively prevent any oxidation.
Form Availability: The product is available in versatile forms such as rods with diameters ranging from 3-6 mm, and convenient coils.
| Filler | Composition | Key Use Case |
|---|---|---|
| RBCuZn-D | Cu-Zn-Sn-Fe | Marine corrosion resistance |
| RBCuZn-C | Cu-Zn-Si (no Sn/Fe) | General-purpose brazing |
| ERCuSn-A | Cu-Sn (phosphor bronze) | Bronze welding, bearings |
Critical Note:
RBCuZn-D is not interchangeable with silicon bronzes (e.g., ERCuSi-A) or nickel alloys. It is specially designed for exclusive use with Cu-Zn base metals and dissimilar joints needing resistance to seawater conditions.
For full specifications, refer to AWS A5.8:2021 (Specification for Brazing Filler Metals). This will ensure you're fully informed about the product's capabilities and applications..
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